A modular heat pump unit and system

Abstract

The present invention provides a modular heat pump unit and system thereof. The heat pump unit comprises a heat pump housing, in which a plurality of installation positions for single heat pump modules are arranged, each of which can be installed with a single heat pump module, and the plurality of single heat pump modules are arranged side by side. The heat pump housing is a housing of standardized size, and the water circulation system of the single heat pump module has a water pipe and an easily detachable interface component. When the plurality of single heat pump modules are arranged side by side, the water circulation systems of the single heat pump modules are interconnected through the interface component to form a continuous water circuit. The number of the single heat pump modules is 2 or more, and each single heat pump module has the same structure and size. By setting the housing of the heat pump unit to a standardized size, the stacking of the heat pump units is conveniently realized, thereby greatly reducing the occupied area of ​​land.

Description

Technical Field

[0001] The invention relates to the field of heating, ventilation and air conditioning, and in particular to a heat pump unit and system. Background Art

[0002] Air source heat pump units are widely used in high-end buildings such as office buildings, commercial buildings, and hotels. They are popular because they can take into account both cooling and heating at the same time, and adjust the working quantity and working status of the units according to the heating or cooling needs of the building. However, in order to meet the needs of the building, when a large number of air source heat pump units need to be provided, these units occupy a large area of ​​land, which reduces the economic efficiency. The distance between the unit and the building is too small, and the noise generated by the unit during operation will affect the residents. In addition, the space between units is small, and the side-inlet and top-outlet form is often adopted. Therefore, after the cold air descends, it is easy to be sucked in again by the adjacent units, forming a cold island effect. It can be seen that how to reduce the footprint of the heat pump unit, reduce noise, and solve the problems caused by the cold island effect have become technical problems that need to be solved urgently in this field.

[0003] In order to solve the above technical problems, some people have proposed the solution of energy building. That is, to build a multi-story energy building for air source heat pump units, and set the air source heat pump units on each floor of the energy building to reduce the land area occupied, and increase the distance between the units when placing them to solve the problem of cold island. However, this method requires the construction of a separate energy building, the civil engineering cost is too high, the construction period is long, and the economic efficiency is not high.

[0004] CN109059343A discloses a modular integral heat exchange refrigeration device, and specifically discloses that a heat pump unit is arranged in a container, and the containers are stacked to reduce the land area occupied, and it is proposed to add sound insulation materials on the inner surface of the container to reduce the impact of noise. However, this technical solution is only a preliminary technical solution. Although it can solve the problem of excessive land area occupied, it does not propose solutions for how to further reduce the cold island effect between units, completely solve the noise problem, and how to achieve connection and work coordination between modules. Summary of the invention

[0005] In view of the shortcomings and defects of the prior art, the present invention provides a modular heat pump unit, which includes a heat pump housing, the heat pump housing having a height in a first direction perpendicular to the ground, a width in a second direction perpendicular to the first direction, and a thickness in a third direction perpendicular to both the first direction and the second direction; a plurality of installation positions for single heat pump modules are arranged in the heat pump housing, each of the installation positions can be equipped with a single heat pump module, and the plurality of single heat pump modules are arranged along the second direction; the heat pump housing is a housing of standardized size, and the single heat pump module has a compressor, a shell and tube heat exchanger, a fin heat exchanger, a fan, and a water circulation system; wherein the fins of the fin heat exchanger extend along the first direction, and the fan is arranged on one side of the fin heat exchanger along the third direction, so that air flows from an opening on one side of the heat pump housing through the fin heat exchanger and flows to an opening on the other side of the heat pump housing along the third direction;

[0006] The water circulation system of the monomer heat pump module has a water pipe and an easily detachable interface component. When a plurality of the monomer heat pump modules are arranged side by side along the second direction, the water circulation systems of the monomer heat pump modules are connected to each other through the interface component to form a continuous water path;

[0007] The number of the single heat pump modules is 2 or more, and each single heat pump module has the same structure and size.

[0008] Furthermore, the number of the single heat pump modules is 3 to 6.

[0009] Furthermore, the heat pump housing includes a top plate, a floor plate, a side wall plate, and an end wall plate. The side wall plate has an opening, and the opening corresponds to the air inlet and the air outlet of the fin heat exchanger of the single heat pump module.

[0010] Furthermore, the heat pump housing has a connection structure that facilitates continuous stacking in the first direction.

[0011] Furthermore, an air valve is provided at the opening on the side wall panel of the heat pump housing, the angle of the air valve is adjustable, and the blade angle of the air valve at the air outlet is upward to reflect the noise of the fan upward.

[0012] Furthermore, the compressor and the fan are arranged on one side, the fan is arranged in a noise reduction box, and the compressor is arranged in a sound insulation cover.

[0013] Furthermore, an inlet air volume distributor is arranged in front of the fin heat exchanger, and the inlet air volume distributor allows air to flow evenly through the fins of the fin heat exchanger.

[0014] Furthermore, a line inlet control box is provided on the heat pump housing, and the control box is connected to each of the individual heat pump modules and controls the individual heat pump modules.

[0015] The present invention also provides a modular heat pump unit system, wherein the system is formed by stacking the units described above in a first direction perpendicular to the ground.

[0016] Furthermore, the system has 3-6 stacked layers.

[0017] The present invention can achieve the following technical effects:

[0018] By setting the box of the heat pump unit to a standardized size, the stacking of the heat pump unit is conveniently realized, thereby greatly reducing the occupied land area. Several single heat pump modules can be placed in the box of the heat pump unit according to demand, and the number of modules can be flexibly set, so that heat pump units with different output powers can be matched and any combination can be achieved. Each single heat pump module has a side inlet and side outlet for the air flow path, so not only will there be no cold island effect, but also there will be no impact on each other after the heat pump units are stacked. The pipes of the water circulation system of each single heat pump module are prefabricated in advance and do not need to be installed on site. The modules are quickly combined into a complete pipe system through easily detachable water interfaces, and the accumulated errors can be automatically eliminated, greatly reducing the time cost of on-site construction. By reducing the noise of the single heat pump module, the impact of the noise of the unit on nearby residents can be greatly reduced. The water tray and auxiliary defrost system in the unit can completely solve the problem of secondary freezing of defrost water, improve safety and heat exchange efficiency. By setting a flow equalizer, air can be evenly distributed to the heat exchange area of ​​the fin heat exchanger, thereby improving the heat exchange efficiency of the system. Illustrations

[0019] In order to more clearly illustrate the technical solutions in the specific implementation manner of the present invention, the drawings required for use in the specific implementation manner or the description of the prior art will be briefly introduced below.

[0020] Figure 1 This is a schematic diagram of the back side of a modular heat pump unit provided by the present invention.

[0021] Figure 2 This is a front schematic diagram of a modular heat pump unit provided by the present invention.

[0022] Figure 3 This is a three-dimensional schematic diagram of a modular heat pump unit provided by the present invention.

[0023] Figure 4 This is a schematic top view of a modular heat pump unit provided by the present invention.

[0024] Figure 5 This is a side schematic diagram of a modular heat pump unit provided by the present invention.

[0025] Figure 6 The present invention provides a three-dimensional schematic diagram of a single heat pump module of a modular heat pump unit.

[0026] Figure 7 This is a side schematic diagram of a single heat pump module of a modular heat pump unit provided by the present invention.

[0027] Figure 8 A schematic top view of a single heat pump module of a modular heat pump unit provided by the present invention.

[0028] Fig. 9 It is a three-dimensional schematic diagram of a single heat pump module of a modular heat pump unit equipped with a sound absorbing panel provided by the present invention.

[0029] Fig.10 (a) is a side view of a single heat pump module of a modular heat pump unit equipped with a sound absorbing panel provided by the present invention.

[0030] Fig.10 (b) is a front schematic diagram of a single heat pump module of a modular heat pump unit equipped with a sound absorbing panel provided by the present invention.

[0031] Fig.11 (a) is a schematic front view of the sound absorbing panel of the present invention.

[0032] Fig.11 (b) is a side view of the sound absorbing panel of the present invention.

[0033] Fig.11 (c) is a schematic top view of the sound absorbing panel of the present invention.

[0034] Fig.12 (a) is a schematic diagram of the noise reduction box in the present invention.

[0035] Fig.12 (b) Fig.12 AA section view of (a).

[0036] Fig.12 (c) Fig.12 (b) Enlarged view of part A.

[0037] Fig.12 (d) Fig.12 (b) Enlarged view of part B.

[0038] Fig.13 It is a three-dimensional schematic diagram of the noise reduction box in the present invention.

[0039] Fig.14 Schematic diagram of noise propagation path.

[0040] Fig.15 It is a front schematic diagram of a water pipe (single pipe) and a clamp structure of the heat pump unit of the present invention.

[0041] Fig.16 for Fig.15 Top view of (clamp structure omitted).

[0042] Fig.17 for Fig.15 Left view of (clamp structure omitted).

[0043] Fig.18 This is a front view of the two water pipes after they are connected.

[0044] Fig.19 for Fig.18 AA section view.

[0045] Fig. 20 for Fig.19 Enlarged view of part B.

[0046] Fig.21 (a) is a front schematic diagram of the clamp structure.

[0047] Fig.21 (b) Fig.21 AA section view of (a).

[0048] Fig. 22 (a) is a front view schematic diagram of the mechanical tee assembly.

[0049] Fig. 22 (b) Fig. 22 AA section view of (a).

[0050] Fig. 22 (c) Fig. 22 (a) BB cross-sectional view.

[0051] Fig.23 A perspective view of a mechanical tee assembly.

[0052] Fig.24 It is a schematic diagram of the structure after the mechanical tee assembly is connected to the shell and tube connecting pipe of the heat pump unit.

[0053] Fig.25 for Fig.24 Enlarged view of part C.

[0054] Fig.26 It is a top view schematic diagram of a heat pump unit equipped with a flow equalizing plate.

[0055] Fig. 27 (a) is the front schematic diagram of the current equalizing plate.

[0056] Fig. 27 (b) Fig. 27 (a) Left view.

[0057] Fig. 27 (c) Fig. 27 (a) Top view.

[0058] Fig.28 It is a three-dimensional schematic diagram of a heat pump unit equipped with a flow equalizing plate.

[0059] Fig.29 It is a side view of a heat pump unit equipped with a water tray.

[0060] Fig.30 (a) is a schematic diagram of the front view of the water tray.

[0061] Fig.30 (b) Fig.30 AA cross-section of (a).

[0062] Fig.30 (c) Fig.30 (a) Left view.

[0063] Fig.30 (d) Fig.30 (a) Top view.

[0064] 1-heat pump housing, 2-single heat pump module, 3-one-way inlet control box, 4-inlet air valve, 5-outlet air valve, 6-inspection door, 7-water pipe components, 8-defrost water collection main pipe, 9-compressor, 10-fan, 11-shell and tube heat exchanger, 12-fin heat exchanger, 201-sound absorbing board, 202-frame enclosure, 203-reinforcement rib, 21-guide plate, 22-porous plate, 23-microfiber sound absorbing material, 901-noise reduction housing, 91-inner plate, 92-panel, 93-sound insulation material, 94-top plate assembly, 95-side plate assembly, 96-bottom plate assembly, 71-water pipe, 72-clamp structure, 73-mechanical Tee assembly, 74 heat pump unit shell and tube connection, 71-1 groove, 72-5- boss, 72-6- tip protrusion, 72-1- half ring, 72-2- lug, 72-3- bolt, 72-4- rubber sealing ring, 3-1 rubber sealing pad, 33 flow plate, 33-1- horizontal partition, 33-2- vertical partition, 44-1- guard plate, 44-2- groove, 44-3- slope, 44-4- drain pipe, 44-5- cone structure, 44-6- insulation layer, 44-7- electric heating belt DETAILED DESCRIPTION

[0065] The structure and operation of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the accompanying drawings are provided only for a better understanding of the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0066] In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if the terms "first" and "second" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0067] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] Example 1

[0069] Figures 1 to 4 A modular heat pump unit is shown, which includes a heat pump housing 1, wherein the heat pump housing 1 has a height in a first direction perpendicular to the ground, a width in a second direction perpendicular to the first direction, and a thickness in a third direction perpendicular to both the first and second directions; a plurality of installation positions for single heat pump modules 2 are arranged in the heat pump housing, each of which can be equipped with a single heat pump module 2, and the plurality of single heat pump modules 2 are arranged along the second direction; the heat pump housing 1 is a housing of standardized size, for example, the size of the heat pump housing 1 can be consistent with that of an international shipping container. Since the heat pump housing 1 is of standardized size, multiple heat pump housings can be stacked, and each heat pump housing has a connection structure that facilitates continuous stacking in the first direction.

[0070] Figures 5 to 8The single heat pump module 2 provided in the modular heat pump unit is shown, and the single heat pump module 2 has a compressor 9, a shell and tube heat exchanger 11, a fin heat exchanger 12, a fan 10 and a water circulation system. The fins of the fin heat exchanger 12 extend along a first direction, and the fan 10 is provided on one side of the fin heat exchanger 12 along a third direction, so that the air flows from the opening on one side of the heat pump housing 1 through the fin heat exchanger 12 and flows to the opening on the other side of the heat pump housing 1 along the third direction. The reason why the fins of the fin heat exchanger 12 extend along the first direction is to enable the defrost water to be discharged smoothly under the action of gravity, so as to prevent the defrost water from freezing again and bringing adverse effects to the unit.

[0071] The water circulation system of the monomer heat pump module 2 has a water pipe component 7 and an easily detachable interface component. When several monomer heat pump modules 2 are arranged side by side along the second direction, the water circulation systems of each monomer heat pump module 2 are interconnected through the interface component to form a continuous water path.

[0072] The number of the monomer heat pump modules is 2 or more. In an optimized embodiment, the number of the monomer heat pump modules is 3-6. Each monomer heat pump module has the same structure and size. It is understood that the number of the monomer heat pump modules can be increased according to actual needs, for example, it can be increased to 8, 10 or more. The above numbers are only exemplary and do not constitute a limitation on the scope of protection of the claims.

[0073] Specifically, the heat pump housing 1 includes a top plate, a floor plate, a side wall plate, and an end wall plate. The side wall plate has an opening, and the opening corresponds to the air inlet and the air outlet of the fin heat exchanger 12 of the single heat pump module 2. An inlet air valve 4 and an outlet air valve 5 are provided on the opening. In other embodiments, movable shutters can be used instead of air valves. In an optimized embodiment, the blade angle on the air valve can be adjusted, which is of great significance for reducing noise. For example, when the blade angle of the outlet air valve 5 is adjusted to tilt upward, the noise generated by the fan will be reflected upward by the blades of the outlet air valve to a space above 2 meters, while the activity space of people is generally below 2 meters, so the impact of the noise generated by the fan is greatly reduced.

[0074] In order to further reduce the impact of noise, the compressor and the fan are arranged on one side of the single heat pump module 2, and the fan is arranged in a noise reduction box, and the compressor is arranged in a soundproof cover, so as to reduce the noise generated by these two noise components.

[0075] In a specific embodiment, an inlet air volume distributor is arranged in front of the fin heat exchanger, and the inlet air volume distributor allows air to flow evenly through the fins of the fin heat exchanger.

[0076] The heat pump housing is provided with a line-inlet control box 3, which is connected to each of the individual heat pump modules and controls the individual heat pump modules. In this way, all the individual heat pump modules can be controlled by one control box, so as to reduce the complexity and cost of the circuit and facilitate the coordinated control of all the individual heat pump modules.

[0077] Combine the following Figures 15 to 25 The structure and working principle of the water pipe component 7 and the easily detachable interface component in the present invention are explained. The water pipe component 7 in the present invention has the characteristics of quick connection and automatic error elimination. Specifically, the water pipe component 7 includes a water pipe 71 and a clamp structure 72 that connects two adjacent water pipes, and the clamp structure 72 is the easily detachable interface component. The end of the water pipe 71 has a groove 71-1, and the clamp structure 72 has two half rings 72-1, and the two ends of the half ring 72-1 have lugs 72-2; the two sides of the half ring 72-1 have bosses 72-5 protruding along the circumferential direction, and an internal groove is formed between the bosses 72-5, and a rubber sealing ring 72-4 is arranged in the groove.

[0078] Fig.18 The structure diagram of two water pipes 71 connected by a clamp structure 72 is shown. The two water pipes 71 are connected at the ends, and the bosses 72-5 of the two half rings 72-1 of the clamp structure 72 extend into the grooves 71-1 at the ends of the water pipes on both sides respectively. The two half rings are fixed by a connecting piece, and the two half rings form a ring and realize the connection of the water pipes on both sides. In a specific embodiment, the connecting piece can be a bolt 2-3.

[0079] like Fig. 20 As shown, the two sides of the rubber seal ring 72-4 have pointed protrusions 72-6 extending in the circumferential direction, and the pointed protrusions abut against the edge of the groove 71-1 at the end of the water pipe. Since the rubber seal ring 72-4 is elastic, it can form a good seal on the water pipe connection and eliminate the size and assembly errors when the water pipe is connected.

[0080] Specifically, a mechanical tee assembly 73 is further provided on the water pipe 71, and the mechanical tee assembly 73 is used to be connected to the shell and tube connecting pipe 74 of the heat pump unit. Figure 22-25 The specific structure and assembly relationship of the mechanical three-way assembly 3 are shown, wherein a rubber sealing pad 73-1 is provided at the connection between the mechanical three-way assembly 73 and the water pipe 71, so as to achieve sealing between the water pipe 71 and the mechanical three-way assembly 73. Fig.25As shown, the diameter of the circular tube of the mechanical tee assembly 3 is a, and the matching hole diameter on the water pipe 1 is slightly larger than a. There is a gap of 1-2 mm between the two for adjusting the error, and the gap will be sealed by the internal rubber sealing pad 3-1 to prevent water leakage.

[0081] It is understandable that the water pipe 1 can be a straight pipe or a curved pipe, and as long as there are grooves at both ends, it can be connected and fixed by a clamp structure.

[0082] The water pipes are connected by a clamp structure. The rubber ring inside the clamp structure has a certain elasticity and movable gap, which can make up for various errors in the water pipe processing and assembly process, greatly reducing the production difficulty and the requirements for the workers' operating level, and can achieve rapid installation between water pipes. It is very suitable for the on-site water assembly process of various heat pump units.

[0083] Combine the following Figures 8 to 14 The noise reduction structure of the heat pump unit of the present invention is explained in detail.

[0084] like Figure 8 , Fig. 9 , Fig.10 As shown, a fan muffler is arranged downstream of the fan 10 of the heat pump unit along the airflow direction, and the fan muffler includes a frame enclosure 202 and a plurality of sound absorbing panels 201. The frame enclosure 202 is arranged around the fan 10, and the sound absorbing panels 201 are arranged on the frame enclosure 202 at intervals.

[0085] Fig.11 The specific structure of the sound absorbing plate is shown. The sound absorbing plate 201 is composed of a guide plate 21 and a porous plate 22 , and the sound absorbing plate 201 extends along the airflow direction so that the airflow first passes through the guide plate 21 and then flows through the porous plate 22 .

[0086] The sound absorbing board is also provided with a microfiber sound absorbing material 23. In a specific embodiment, the microfiber sound absorbing material 23 is in the shape of a long strip, extending from one side of the sound absorbing board to the other side. In an optimized embodiment, the number of the microfiber sound absorbing materials 23 is two or more. The sound absorbing panels 201 are arranged on the frame enclosure at the same interval L. The interval L can be flexibly adjusted according to demand. Specifically, a plurality of guide protrusions are provided on the guide plate 21. The frame enclosure is provided with reinforcing ribs 203, and the reinforcing ribs 203 are used to strengthen and fix the frame enclosure 202.

[0087] like Fig. 9 As shown, the sound absorbing panel 201 has a height in a direction perpendicular to the air flow direction, and the height is equivalent to the height of the air outlet.

[0088] The fan is the main source of noise in the air source heat pump unit, so reducing the noise of the fan is one of the main goals. The working principle of the fan silencer in the present invention is: when the fan rotates, the air (including noise) rushes to the porous plate through the guide plate, part of which is absorbed by the sound-absorbing material inside, and part is reflected to the sound-absorbing plate next to it. This is repeated and the noise gradually decays. When the noise is transmitted to the outside of the silencer with the air, the decibel value has been greatly reduced. Fig.14 The noise propagation and attenuation process is shown.

[0089] The compressor is another major noise source of the heat pump unit, so it is also very important to control the noise of the compressor. Fig.12 , Fig.13 As shown, the compressor of the heat pump unit disclosed in the present invention is arranged in a noise reduction box body 901, and the noise reduction box body 901 includes a top plate assembly 94, a side plate assembly 95 and a bottom plate assembly 96, wherein the side plate assembly 95 includes an inner plate 91 and a panel 92, and sound insulation material is arranged between the inner plate 91 and the panel 92.

[0090] The top plate assembly 94 and the bottom plate assembly 96 are provided with slots, such as Fig.12 c and Fig.12 As shown in d, the side plate can be embedded in the slot to form a labyrinth seal.

[0091] The compressor noise reduction principle in this embodiment is mainly absorption and blocking transmission. The compressor is wrapped in a noise reduction box. When the compressor is working, mechanical friction, periodic meshing of the dynamic and static scrolls, and the electromagnetic sound of the motor are mixed together to form a complex noise spectrum. After the noise is transmitted from the compressor, part of it is absorbed by the sound insulation cotton through the through holes on the inner panel, and part of it is blocked by the panel and transmitted to the air. After multiple layers of processing, the noise is greatly attenuated. The transmission path is as follows: Fig.14 In addition, the grooves of the bottom plate and the top plate form a labyrinth seal to reduce noise leakage.

[0092] Furthermore, the heat pump unit is also provided with an electric control box, which is located just in front of the compressor and can further block the noise propagation of the compressor.

[0093] In this embodiment, the compressor and the fan are arranged on the same side of the heat pump unit.

[0094] The inner wall of the heat pump unit box is also provided with sound absorbing material to further reduce the noise of the heat pump unit.

[0095] Combine the following Figure 26 to Figure 28The specific structure and working principle of the air volume equalizer of the present invention are explained. The air volume equalizer in the present invention is specifically a flow equalizer 33. Two areas with triangular cross-sections on a plane parallel to the ground are formed between the fin heat exchanger 2 and the heat pump housing 1, and the flow equalizer 33 is arranged in the triangular area.

[0096] The flow equalizer 33 has a plurality of transverse partitions 33-1 and vertical partitions 33-2, and a plurality of air ducts 33-3 are separated between the transverse partitions 33-1 and the vertical partitions 33-2. Specifically, the cross section of the flow equalizer on a plane parallel to the ground is a triangle or a nearly triangular shape, and the surface where the hypotenuse c of the triangle is located is aligned with the surface of the fin heat exchanger facing the air inlet. Under the action of the flow equalizer, the air is evenly distributed on the surface of the fin heat exchanger.

[0097] It can be seen intuitively from the figure that the plurality of transverse partitions 33 - 1 on the flow equalizing plate are parallel to each other, and the vertical partitions 33 - 2 are also parallel to each other.

[0098] Specifically, the current equalizing plate is a plastic or PVC component. It is understandable that the current equalizing plate can be made of other suitable materials, such as sheet metal materials, which can be flexibly selected by those skilled in the art according to actual needs. The above selection of materials is only an example and does not constitute a limitation on the scope of protection of the claims of the present invention.

[0099] Specifically, the cross section of the current equalizing plate is a right triangle. It is understandable that the shape of the cross section may also be a shape approximating a right triangle.

[0100] Under the action of the flow equalizing plate 33, the air entering from the air inlet of the heat pump unit can be evenly distributed to the surface of the fin heat exchanger, thereby maximizing the heat exchange capacity of the fin heat exchanger and improving the heat exchange efficiency.

[0101] Combine the following Figure 29 to Figure 30 The structure and working principle of the water receiving tray and the auxiliary defrosting device in the present invention are explained.

[0102] The heat pump unit of the present invention further comprises a water receiving tray 44 , which is located below the fins of the fin heat exchanger 12 and extends along the third direction.

[0103] The fins of the fin heat exchanger 12 extend along a first direction, and ends of the fins extend into the water receiving tray 44 .

[0104] The water receiving tray 44 has a guard plate 44-1 and a surrounding groove 44-2, and the guard plate and the surrounding groove surround the ends of the fins to form a closed cavity. Fig.30As shown in (b), the guard plate 44-1 is fixed on the side of the groove 44-2 of the water receiving tray, and the guard plate 44-1 extends upward and is inclined toward the fin. When the fin goes deep into the water receiving tray, the guard plate 44-1 can overlap the side of the fin, so that the water receiving tray forms a closed cavity that wraps the fin, which makes it convenient for defrost water to fall into the water receiving tray and prevents heat loss.

[0105] The frost formed on the fins turns into water after defrosting and flows downward along the fins into the cavity formed by the water receiving tray.

[0106] The bottom of the water receiving tray has a slope 44-3 and a drain pipe 44-4. The inlet of the drain pipe 44-4 is located at or near the lowest point of the slope. After entering the water receiving tray, the defrost water on the fins is collected along the slope to the lowest point and discharged from the drain pipe. Fig.30 As shown in (a), an angle α is formed between the inclined plane and the horizontal plane. The angle α can be set as needed, for example, it can be 15°-60°, and in an optimized embodiment it can be 30°-45°.

[0107] like Fig.30 (b) and Fig.30 As shown in (d), the bottom of the water receiving tray is provided with a plurality of high-density conical structures 44-5 or protrusions. The function of the conical structures 44-5 or protrusions is to prevent the formation of water film and thus control the formation of water droplets, and finally achieve the purpose of no water droplets hanging on the side, that is, no secondary freezing. Therefore, when the defrosted water flows into the water receiving tray, even if a water film is to be formed, it will be punctured by the conical structures or protrusions, thereby preventing the formation of a water film.

[0108] In an optimized embodiment, the inner wall of the water receiving tray can be sprayed with hydrophobic material. Under the action of the hydrophobic material, the water film is more difficult to adhere to the surface of the water receiving tray, and the water droplets can easily slide off the inner cavity surface of the water receiving tray, which is conducive to the discharge of defrost water.

[0109] The water tray is usually made of sheet metal. Due to its large specific heat capacity and strong heat absorption capacity, its surface temperature is much lower than the ambient temperature in cold areas. In order to prevent the heat of the defrosting water from being absorbed by the water tray, an insulation layer 44-6 can be attached around the water tray. In a specific embodiment, the insulation layer can be insulation cotton or other insulation materials. At the same time, an electric heating belt 44-7 is attached to the bottom of the water tray, and the electric heating belt 44-7 is wrapped with sponge next to the outside of the water tray. In an optimized embodiment, a temperature sensor is provided in the water tray of the unit, and the temperature sensor detects the temperature in the cavity of the water tray. The electric heating belt is automatically controlled according to the temperature detected by the sensor. In extremely cold weather, the electric heating belt is used to assist in heating to ensure that the surface temperature of the water tray is not lower than 0°C, thereby preventing the defrosting water from freezing again. The insulation layer can prevent the heat of the electric heating belt from being quickly dissipated into the air.

[0110] When the heat pump unit starts the defrosting mode, the frost on the fin heat exchanger flows into the water receiving pan along the aluminum foil in the form of liquid water. The bottom of the water receiving pan has an inclined surface, one side is high and the other side is low. The water flows along the inclined surface to the lowest depression, and then is discharged through the drain pipe to prevent the water from accumulating in the water receiving pan and freezing again. The defrosted water drips into the water receiving pan in the form of water flow or water droplets. In order to prevent the water flow / water droplets from splashing and turning into water foam and small water droplets, a high-density conical structure is fixed at the bottom of the water receiving pan to prevent the formation of water film and then control the formation of water droplets, so as to achieve the purpose of not hanging water droplets on the side, that is, no secondary freezing. Insulation cotton is attached around the water receiving pan, and an electric heating belt is attached to the bottom. The electric heating belt is wrapped with sponge next to the outside of the water receiving pan. In extremely cold weather, the electric heating belt is used to assist in heating to ensure that the surface temperature of the water receiving pan is not lower than 0℃. The role of the insulation cotton can prevent the heat of the electric heating from being quickly dissipated into the air. In addition, the two side guard plates are fixed on the side of the water tray, forming a closed cavity with the fin heat exchanger, which greatly reduces heat loss. The electric heating belt, thermal insulation cotton, guard plate, inner hydrophobic material and conical structure and other methods completely solve the problem of secondary freezing of defrosting water.

[0111] The beneficial effects that can be achieved by this embodiment are: by setting the casing of the heat pump unit to a standardized size, the stacking of the heat pump unit is conveniently realized, thereby greatly reducing the occupied area of ​​land. Several single heat pump modules can be placed in the casing of the heat pump unit according to demand, and the number of modules can be flexibly set, so that heat pump units with different output powers can be matched and any combination can be achieved. Each single heat pump module has a side inlet and side outlet for the air flow path, so not only will there be no cold island effect, but also after the heat pump units are stacked, they will not affect each other. The pipes of the water circulation system of each single heat pump module are prefabricated in advance and do not need to be installed on site. The modules are quickly combined into a complete pipe system through easily detachable water interfaces, which greatly reduces the time cost of on-site construction. By noise reduction treatment of the single heat pump module, the impact of the noise of the unit on nearby residents can be greatly reduced.

[0112] Example 2

[0113] This embodiment discloses a modular heat pump unit system, which is formed by stacking the modular heat pump units disclosed in Embodiment 1 in a first direction perpendicular to the ground. In an optimized embodiment, the number of stacked layers is 3-6 layers.

[0114] The above embodiments are only used to illustrate the present invention, wherein the structure, connection method and manufacturing process of each component may be changed. Any equivalent transformations and improvements based on this technical solution should not be excluded from the protection scope of the present invention.

Claims

1. A modular heat pump unit, comprising a heat pump housing, wherein the heat pump housing has a height in a first direction perpendicular to the ground, a width in a second direction perpendicular to the first direction, and a thickness in a third direction perpendicular to both the first direction and the second direction; a plurality of mounting positions for single heat pump modules are arranged in the heat pump housing, each of the mounting positions can be equipped with a single heat pump module, and the plurality of single heat pump modules are arranged along the second direction; the heat pump housing is a housing of standardized size, characterized in that: The single heat pump module comprises a compressor, a shell and tube heat exchanger, a fin heat exchanger, a fan, and a water circulation system; wherein the fins of the fin heat exchanger extend along a first direction, and the fan is arranged on one side of the fin heat exchanger along a third direction, so that air flows from an opening on one side of the heat pump housing through the fin heat exchanger and flows to an opening on the other side of the heat pump housing along the third direction; The water circulation system of the monomer heat pump module has a water pipe and an easily detachable interface component. When a plurality of the monomer heat pump modules are arranged side by side along the second direction, the water circulation systems of the monomer heat pump modules are connected to each other through the interface component to form a continuous water path; The number of the single heat pump modules is more than 2, and each single heat pump module has the same structure and size; The heat pump housing has a connection structure that facilitates continuous stacking in a first direction; An air valve is arranged at the opening on the side wall panel of the heat pump housing, and the angle of the air valve can be adjusted. The blade angle of the air valve at the air outlet is upward to reflect the noise of the fan upward.

2. The unit according to claim 1, characterized in that: The number of the single heat pump modules is 3 to 6.

3. The unit according to claim 1, characterized in that: The heat pump housing comprises a top plate, a floor plate, a side wall plate, and an end wall plate. The side wall plate is provided with an opening, and the opening corresponds to an air inlet and an air outlet of a fin heat exchanger of the single heat pump module.

4. The unit according to claim 1, characterized in that: The compressor and the fan are arranged on one side, the fan is arranged in a noise reduction box, and the compressor is arranged in a sound insulation cover.

5. The unit according to claim 1, characterized in that: An inlet air volume distributor is arranged in front of the fin heat exchanger, and the inlet air volume distributor allows air to flow evenly through the fins of the fin heat exchanger.

6. The unit according to claim 1, characterized in that: The heat pump housing is provided with an inlet control box, and the control box is connected to each of the monomer heat pump modules and controls the monomer heat pump modules.

7. A modular heat pump unit system, characterized in that: The system is formed by stacking the units according to any one of claims 1 to 6 in a first direction perpendicular to the ground.

8. The system according to claim 7, characterized in that: The system has 3 to 6 stacked layers.

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